E-Throttle

Insulation Resistance All know that the resistance of a pure insulation is infinity. But to no extend we can make a pure insulation. So we have a small leakage current to flow through insulation depending upon the voltage applied. Thus as the result we get a resistance value in the range of Mega Ohms(MΩ) or Giga Ohms(GΩ).   Here the applied voltage is DC. We have separate kit for injecting the DC voltage. Usually that equipment is known as megger. The two windings are connected as in the diagram above and Megger is used to measure the insulation resistance. It applies a high voltage normally 500V or 1kV for time period of minimum 30 seconds to One minute and the respective resistance are noted down. Usually for a new transformer, result value will be in Giga Ohms(GΩ). During the ageing, deposition of dust, moisture and other unwanted particles can cause the megger value to reduce. So to gain the resistance back to normal, the dust deposited should be removed, moisture shoul...

What are the network elements ? Why we need these ?      Well, simple questions with explanatory answers !  Not exactly if you keep up the reading. As we know the ,An Electrical network is an interconnection of electrical components. So there will be a closed path  for current flow through various circuit components to produce the desired function.The electrical components can be broadly classified  to two as follows, 1. Active Components  In general terms it could be defined as the components with an ability to amplify or process the electrical signal or components having some energy levels to impart. examples are diode,transistors, scr, opamps etc. 2. Passive Components    from the concept about the active components its easy to understand whats are passive ones. ie, The components doesn't having any capability to amplify or process electrical signal its own, but these could support these processes while active components ...